The Ricoh GXR camera body, GRX + S10 lens kit and GRX + A16 lens kit are all listed as discontinued. The GXR system was announced in November 2009 but since the modules where the sensor is located are interchangeable, it remains to be seen if Ricoh will decide to upgrade the camera body.
The Ricoh GXR camera body is also no longer listed at Adorama.